# A025842 (b-file synthesized from sequence entry) 0 1 1 0 2 0 3 1 4 0 5 0 6 2 7 0 8 1 9 2 10 0 11 1 12 3 13 0 14 2 15 3 16 1 17 2 18 4 19 1 20 3 21 4 22 2 23 3 24 6 25 2 26 4 27 6 28 3 29 4 30 8 31 3 32 6 33 8 34 4 35 6 36 10 37 4 38 8 39 10 40 6 41 8 42 12 43 6 44 10 45 12 46 8 47 10 48 15 49 8 50 12 51 15 52 10 53 12 54 18 55 10 56 15 57 18 58 12 59 15 60 21 61 12 62 18 63 21 64 15 65 18 66 24 67 15 68 21